// Listing 7.6: arrfun2.cpp --functions with an array argument
#include <iostream>
const int ArSize = 8;
int sum_arr(int arr[], int n); 

// return the sum of an integer array
int sum_arr(int arr[], int n)
{
    int total = 0;
    std::cout << arr << " = arr, ";
    // some systems require a type cast: unsigned (arr)
    std::cout << sizeof(*arr) << " = sizeof arr\n";
    for(int i = 0; i < n; i++)
    {
        total = total + arr[i];
    }
    return total;
}

int main(void)
{
    int cookies[ArSize] = {1,2,4,8,16,32,64,128};
	// some systems requires preceding int with static to
	// enable array initialization	
    std::cout << cookies << " = array address, ";
	// some systems require a type cast: unsigned (cookies)
	std::cout << sizeof cookies << " = sizeof cookies\n";
	int sum = sum_arr(cookies, ArSize);
	std::cout << "Total cookies eaten: " << sum << std::endl;
    sum = sum_arr(cookies, 3);    // a lie
    std::cout << "First three eaters ate " << sum << " cookies.\n";    
    sum = sum_arr(cookies + 4, 4);    // another lie
    std::cout << "Last four eaters ate " << sum << " cookies.\n";
    return 0;
}
